src/mesa/main/fbobject.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 1999-2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /*
  28  * GL_EXT/ARB_framebuffer_object extensions
  29  *
  30  * Authors:
  31  *   Brian Paul
  32  */
  33
  34
  35 #include "buffers.h"
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "fbobject.h"
  39 #include "formats.h"
  40 #include "framebuffer.h"
  41 #include "hash.h"
  42 #include "macros.h"
  43 #include "mfeatures.h"
  44 #include "mtypes.h"
  45 #include "renderbuffer.h"
  46 #include "state.h"
  47 #include "teximage.h"
  48 #include "texobj.h"
  49
  50
  51 /** Set this to 1 to help debug FBO incompleteness problems */
  52 #define DEBUG_FBO 0
  53
  54 /** Set this to 1 to debug/log glBlitFramebuffer() calls */
  55 #define DEBUG_BLIT 0
  56
  57
  58 /**
  59  * Notes:
  60  *
  61  * None of the GL_EXT_framebuffer_object functions are compiled into
  62  * display lists.
  63  */
  64
  65
  66
  67 /*
  68  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  69  * these placeholder objects into the hash table.
  70  * Later, when the object ID is first bound, we replace the placeholder
  71  * with the real frame/renderbuffer.
  72  */
  73 static struct gl_framebuffer DummyFramebuffer;
  74 static struct gl_renderbuffer DummyRenderbuffer;
  75
  76 /* We bind this framebuffer when applications pass a NULL
  77  * drawable/surface in make current. */
  78 static struct gl_framebuffer IncompleteFramebuffer;
  79
  80
  81 #define IS_CUBE_FACE(TARGET) \
  82    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  83     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  84
  85
  86 static void
  87 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  88 {
  89    /* no op */
  90 }
  91
  92 static void
  93 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  94 {
  95    /* no op */
  96 }
  97
  98
  99 void
 100 _mesa_init_fbobjects(struct gl_context *ctx)
 101 {
 102    _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);
 103    _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);
 104    _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);
 105    DummyFramebuffer.Delete = delete_dummy_framebuffer;
 106    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
 107    IncompleteFramebuffer.Delete = delete_dummy_framebuffer;
 108 }
 109
 110 struct gl_framebuffer *
 111 _mesa_get_incomplete_framebuffer(void)
 112 {
 113    return &IncompleteFramebuffer;
 114 }
 115
 116 /**
 117  * Helper routine for getting a gl_renderbuffer.
 118  */
 119 struct gl_renderbuffer *
 120 _mesa_lookup_renderbuffer(struct gl_context *ctx, GLuint id)
 121 {
 122    struct gl_renderbuffer *rb;
 123
 124    if (id == 0)
 125       return NULL;
 126
 127    rb = (struct gl_renderbuffer *)
 128       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 129    return rb;
 130 }
 131
 132
 133 /**
 134  * Helper routine for getting a gl_framebuffer.
 135  */
 136 struct gl_framebuffer *
 137 _mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)
 138 {
 139    struct gl_framebuffer *fb;
 140
 141    if (id == 0)
 142       return NULL;
 143
 144    fb = (struct gl_framebuffer *)
 145       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 146    return fb;
 147 }
 148
 149
 150 /**
 151  * Mark the given framebuffer as invalid.  This will force the
 152  * test for framebuffer completeness to be done before the framebuffer
 153  * is used.
 154  */
 155 static void
 156 invalidate_framebuffer(struct gl_framebuffer *fb)
 157 {
 158    fb->_Status = 0; /* "indeterminate" */
 159 }
 160
 161
 162 /**
 163  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 164  * gl_renderbuffer_attachment object.
 165  * This function is only used for user-created FB objects, not the
 166  * default / window-system FB object.
 167  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 168  * the depth buffer attachment point.
 169  */
 170 struct gl_renderbuffer_attachment *
 171 _mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 172                      GLenum attachment)
 173 {
 174    GLuint i;
 175
 176    assert(fb->Name > 0);
 177
 178    switch (attachment) {
 179    case GL_COLOR_ATTACHMENT0_EXT:
 180    case GL_COLOR_ATTACHMENT1_EXT:
 181    case GL_COLOR_ATTACHMENT2_EXT:
 182    case GL_COLOR_ATTACHMENT3_EXT:
 183    case GL_COLOR_ATTACHMENT4_EXT:
 184    case GL_COLOR_ATTACHMENT5_EXT:
 185    case GL_COLOR_ATTACHMENT6_EXT:
 186    case GL_COLOR_ATTACHMENT7_EXT:
 187    case GL_COLOR_ATTACHMENT8_EXT:
 188    case GL_COLOR_ATTACHMENT9_EXT:
 189    case GL_COLOR_ATTACHMENT10_EXT:
 190    case GL_COLOR_ATTACHMENT11_EXT:
 191    case GL_COLOR_ATTACHMENT12_EXT:
 192    case GL_COLOR_ATTACHMENT13_EXT:
 193    case GL_COLOR_ATTACHMENT14_EXT:
 194    case GL_COLOR_ATTACHMENT15_EXT:
 195       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 196       if (i >= ctx->Const.MaxColorAttachments) {
 197          return NULL;
 198       }
 199       return &fb->Attachment[BUFFER_COLOR0 + i];
 200    case GL_DEPTH_STENCIL_ATTACHMENT:
 201       /* fall-through */
 202    case GL_DEPTH_BUFFER:
 203       /* fall-through / new in GL 3.0 */
 204    case GL_DEPTH_ATTACHMENT_EXT:
 205       return &fb->Attachment[BUFFER_DEPTH];
 206    case GL_STENCIL_BUFFER:
 207       /* fall-through / new in GL 3.0 */
 208    case GL_STENCIL_ATTACHMENT_EXT:
 209       return &fb->Attachment[BUFFER_STENCIL];
 210    default:
 211       return NULL;
 212    }
 213 }
 214
 215
 216 /**
 217  * As above, but only used for getting attachments of the default /
 218  * window-system framebuffer (not user-created framebuffer objects).
 219  */
 220 static struct gl_renderbuffer_attachment *
 221 _mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 222                          GLenum attachment)
 223 {
 224    assert(fb->Name == 0);
 225
 226    switch (attachment) {
 227    case GL_FRONT_LEFT:
 228       return &fb->Attachment[BUFFER_FRONT_LEFT];
 229    case GL_FRONT_RIGHT:
 230       return &fb->Attachment[BUFFER_FRONT_RIGHT];
 231    case GL_BACK_LEFT:
 232       return &fb->Attachment[BUFFER_BACK_LEFT];
 233    case GL_BACK_RIGHT:
 234       return &fb->Attachment[BUFFER_BACK_RIGHT];
 235    case GL_AUX0:
 236       if (fb->Visual.numAuxBuffers == 1) {
 237          return &fb->Attachment[BUFFER_AUX0];
 238       }
 239       return NULL;
 240    case GL_DEPTH_BUFFER:
 241       /* fall-through / new in GL 3.0 */
 242    case GL_DEPTH_ATTACHMENT_EXT:
 243       return &fb->Attachment[BUFFER_DEPTH];
 244    case GL_STENCIL_BUFFER:
 245       /* fall-through / new in GL 3.0 */
 246    case GL_STENCIL_ATTACHMENT_EXT:
 247       return &fb->Attachment[BUFFER_STENCIL];
 248    default:
 249       return NULL;
 250    }
 251 }
 252
 253
 254
 255 /**
 256  * Remove any texture or renderbuffer attached to the given attachment
 257  * point.  Update reference counts, etc.
 258  */
 259 void
 260 _mesa_remove_attachment(struct gl_context *ctx,
 261                         struct gl_renderbuffer_attachment *att)
 262 {
 263    if (att->Type == GL_TEXTURE) {
 264       ASSERT(att->Texture);
 265       if (ctx->Driver.FinishRenderTexture) {
 266          /* tell driver that we're done rendering to this texture. */
 267          ctx->Driver.FinishRenderTexture(ctx, att);
 268       }
 269       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 270       ASSERT(!att->Texture);
 271    }
 272    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 273       ASSERT(!att->Texture);
 274       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 275       ASSERT(!att->Renderbuffer);
 276    }
 277    att->Type = GL_NONE;
 278    att->Complete = GL_TRUE;
 279 }
 280
 281
 282 /**
 283  * Bind a texture object to an attachment point.
 284  * The previous binding, if any, will be removed first.
 285  */
 286 void
 287 _mesa_set_texture_attachment(struct gl_context *ctx,
 288                              struct gl_framebuffer *fb,
 289                              struct gl_renderbuffer_attachment *att,
 290                              struct gl_texture_object *texObj,
 291                              GLenum texTarget, GLuint level, GLuint zoffset)
 292 {
 293    if (att->Texture == texObj) {
 294       /* re-attaching same texture */
 295       ASSERT(att->Type == GL_TEXTURE);
 296       if (ctx->Driver.FinishRenderTexture)
 297          ctx->Driver.FinishRenderTexture(ctx, att);
 298    }
 299    else {
 300       /* new attachment */
 301       if (ctx->Driver.FinishRenderTexture && att->Texture)
 302          ctx->Driver.FinishRenderTexture(ctx, att);
 303       _mesa_remove_attachment(ctx, att);
 304       att->Type = GL_TEXTURE;
 305       assert(!att->Texture);
 306       _mesa_reference_texobj(&att->Texture, texObj);
 307    }
 308
 309    /* always update these fields */
 310    att->TextureLevel = level;
 311    att->CubeMapFace = _mesa_tex_target_to_face(texTarget);
 312    att->Zoffset = zoffset;
 313    att->Complete = GL_FALSE;
 314
 315    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 316       ctx->Driver.RenderTexture(ctx, fb, att);
 317    }
 318
 319    invalidate_framebuffer(fb);
 320 }
 321
 322
 323 /**
 324  * Bind a renderbuffer to an attachment point.
 325  * The previous binding, if any, will be removed first.
 326  */
 327 void
 328 _mesa_set_renderbuffer_attachment(struct gl_context *ctx,
 329                                   struct gl_renderbuffer_attachment *att,
 330                                   struct gl_renderbuffer *rb)
 331 {
 332    /* XXX check if re-doing same attachment, exit early */
 333    _mesa_remove_attachment(ctx, att);
 334    att->Type = GL_RENDERBUFFER_EXT;
 335    att->Texture = NULL; /* just to be safe */
 336    att->Complete = GL_FALSE;
 337    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 338 }
 339
 340
 341 /**
 342  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 343  * Attach a renderbuffer object to a framebuffer object.
 344  */
 345 void
 346 _mesa_framebuffer_renderbuffer(struct gl_context *ctx,
 347                                struct gl_framebuffer *fb,
 348                                GLenum attachment, struct gl_renderbuffer *rb)
 349 {
 350    struct gl_renderbuffer_attachment *att;
 351
 352    _glthread_LOCK_MUTEX(fb->Mutex);
 353
 354    att = _mesa_get_attachment(ctx, fb, attachment);
 355    ASSERT(att);
 356    if (rb) {
 357       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 358       if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
 359          /* do stencil attachment here (depth already done above) */
 360          att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
 361          assert(att);
 362          _mesa_set_renderbuffer_attachment(ctx, att, rb);
 363       }
 364    }
 365    else {
 366       _mesa_remove_attachment(ctx, att);
 367    }
 368
 369    invalidate_framebuffer(fb);
 370
 371    _glthread_UNLOCK_MUTEX(fb->Mutex);
 372 }
 373
 374
 375 /**
 376  * For debug only.
 377  */
 378 static void
 379 att_incomplete(const char *msg)
 380 {
 381 #if DEBUG_FBO
 382    _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
 383 #else
 384    (void) msg;
 385 #endif
 386 }
 387
 388
 389 /**
 390  * For debug only.
 391  */
 392 static void
 393 fbo_incomplete(const char *msg, int index)
 394 {
 395 #if DEBUG_FBO
 396    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 397 #else
 398    (void) msg;
 399    (void) index;
 400 #endif
 401 }
 402
 403
 404 /**
 405  * Is the given base format a legal format for a color renderbuffer?
 406  */
 407 GLboolean
 408 _mesa_is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)
 409 {
 410    switch (baseFormat) {
 411    case GL_RGB:
 412    case GL_RGBA:
 413       return GL_TRUE;
 414    case GL_LUMINANCE:
 415    case GL_LUMINANCE_ALPHA:
 416    case GL_INTENSITY:
 417    case GL_ALPHA:
 418       return ctx->Extensions.ARB_framebuffer_object;
 419    case GL_RED:
 420    case GL_RG:
 421       return ctx->Extensions.ARB_texture_rg;
 422    default:
 423       return GL_FALSE;
 424    }
 425 }
 426
 427
 428 /**
 429  * Is the given base format a legal format for a depth/stencil renderbuffer?
 430  */
 431 static GLboolean
 432 is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)
 433 {
 434    switch (baseFormat) {
 435    case GL_DEPTH_COMPONENT:
 436    case GL_DEPTH_STENCIL_EXT:
 437       return GL_TRUE;
 438    default:
 439       return GL_FALSE;
 440    }
 441 }
 442
 443
 444 /**
 445  * Test if an attachment point is complete and update its Complete field.
 446  * \param format if GL_COLOR, this is a color attachment point,
 447  *               if GL_DEPTH, this is a depth component attachment point,
 448  *               if GL_STENCIL, this is a stencil component attachment point.
 449  */
 450 static void
 451 test_attachment_completeness(const struct gl_context *ctx, GLenum format,
 452                              struct gl_renderbuffer_attachment *att)
 453 {
 454    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 455
 456    /* assume complete */
 457    att->Complete = GL_TRUE;
 458
 459    /* Look for reasons why the attachment might be incomplete */
 460    if (att->Type == GL_TEXTURE) {
 461       const struct gl_texture_object *texObj = att->Texture;
 462       struct gl_texture_image *texImage;
 463       GLenum baseFormat;
 464
 465       if (!texObj) {
 466          att_incomplete("no texobj");
 467          att->Complete = GL_FALSE;
 468          return;
 469       }
 470
 471       texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
 472       if (!texImage) {
 473          att_incomplete("no teximage");
 474          att->Complete = GL_FALSE;
 475          return;
 476       }
 477       if (texImage->Width < 1 || texImage->Height < 1) {
 478          att_incomplete("teximage width/height=0");
 479          printf("texobj = %u\n", texObj->Name);
 480          printf("level = %d\n", att->TextureLevel);
 481          att->Complete = GL_FALSE;
 482          return;
 483       }
 484       if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
 485          att_incomplete("bad z offset");
 486          att->Complete = GL_FALSE;
 487          return;
 488       }
 489
 490       baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
 491
 492       if (format == GL_COLOR) {
 493          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 494             att_incomplete("bad format");
 495             att->Complete = GL_FALSE;
 496             return;
 497          }
 498          if (_mesa_is_format_compressed(texImage->TexFormat)) {
 499             att_incomplete("compressed internalformat");
 500             att->Complete = GL_FALSE;
 501             return;
 502          }
 503       }
 504       else if (format == GL_DEPTH) {
 505          if (baseFormat == GL_DEPTH_COMPONENT) {
 506             /* OK */
 507          }
 508          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 509                   ctx->Extensions.ARB_depth_texture &&
 510                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 511             /* OK */
 512          }
 513          else {
 514             att->Complete = GL_FALSE;
 515             att_incomplete("bad depth format");
 516             return;
 517          }
 518       }
 519       else {
 520          ASSERT(format == GL_STENCIL);
 521          if (ctx->Extensions.EXT_packed_depth_stencil &&
 522              ctx->Extensions.ARB_depth_texture &&
 523              baseFormat == GL_DEPTH_STENCIL_EXT) {
 524             /* OK */
 525          }
 526          else {
 527             /* no such thing as stencil-only textures */
 528             att_incomplete("illegal stencil texture");
 529             att->Complete = GL_FALSE;
 530             return;
 531          }
 532       }
 533    }
 534    else if (att->Type == GL_RENDERBUFFER_EXT) {
 535       const GLenum baseFormat =
 536          _mesa_get_format_base_format(att->Renderbuffer->Format);
 537
 538       ASSERT(att->Renderbuffer);
 539       if (!att->Renderbuffer->InternalFormat ||
 540           att->Renderbuffer->Width < 1 ||
 541           att->Renderbuffer->Height < 1) {
 542          att_incomplete("0x0 renderbuffer");
 543          att->Complete = GL_FALSE;
 544          return;
 545       }
 546       if (format == GL_COLOR) {
 547          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 548             att_incomplete("bad renderbuffer color format");
 549             att->Complete = GL_FALSE;
 550             return;
 551          }
 552       }
 553       else if (format == GL_DEPTH) {
 554          if (baseFormat == GL_DEPTH_COMPONENT) {
 555             /* OK */
 556          }
 557          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 558                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 559             /* OK */
 560          }
 561          else {
 562             att_incomplete("bad renderbuffer depth format");
 563             att->Complete = GL_FALSE;
 564             return;
 565          }
 566       }
 567       else {
 568          assert(format == GL_STENCIL);
 569          if (baseFormat == GL_STENCIL_INDEX) {
 570             /* OK */
 571          }
 572          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 573                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 574             /* OK */
 575          }
 576          else {
 577             att->Complete = GL_FALSE;
 578             att_incomplete("bad renderbuffer stencil format");
 579             return;
 580          }
 581       }
 582    }
 583    else {
 584       ASSERT(att->Type == GL_NONE);
 585       /* complete */
 586       return;
 587    }
 588 }
 589
 590
 591 /**
 592  * Test if the given framebuffer object is complete and update its
 593  * Status field with the results.
 594  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 595  * driver to make hardware-specific validation/completeness checks.
 596  * Also update the framebuffer's Width and Height fields if the
 597  * framebuffer is complete.
 598  */
 599 void
 600 _mesa_test_framebuffer_completeness(struct gl_context *ctx,
 601                                     struct gl_framebuffer *fb)
 602 {
 603    GLuint numImages;
 604    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 605    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 606    GLint numSamples = -1;
 607    GLint i;
 608    GLuint j;
 609
 610    assert(fb->Name != 0);
 611
 612    numImages = 0;
 613    fb->Width = 0;
 614    fb->Height = 0;
 615
 616    /* Start at -2 to more easily loop over all attachment points.
 617     *  -2: depth buffer
 618     *  -1: stencil buffer
 619     * >=0: color buffer
 620     */
 621    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 622       struct gl_renderbuffer_attachment *att;
 623       GLenum f;
 624       gl_format mesaFormat;
 625
 626       /*
 627        * XXX for ARB_fbo, only check color buffers that are named by
 628        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 629        */
 630
 631       /* check for attachment completeness
 632        */
 633       if (i == -2) {
 634          att = &fb->Attachment[BUFFER_DEPTH];
 635          test_attachment_completeness(ctx, GL_DEPTH, att);
 636          if (!att->Complete) {
 637             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 638             fbo_incomplete("depth attachment incomplete", -1);
 639             return;
 640          }
 641       }
 642       else if (i == -1) {
 643          att = &fb->Attachment[BUFFER_STENCIL];
 644          test_attachment_completeness(ctx, GL_STENCIL, att);
 645          if (!att->Complete) {
 646             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 647             fbo_incomplete("stencil attachment incomplete", -1);
 648             return;
 649          }
 650       }
 651       else {
 652          att = &fb->Attachment[BUFFER_COLOR0 + i];
 653          test_attachment_completeness(ctx, GL_COLOR, att);
 654          if (!att->Complete) {
 655             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 656             fbo_incomplete("color attachment incomplete", i);
 657             return;
 658          }
 659       }
 660
 661       /* get width, height, format of the renderbuffer/texture
 662        */
 663       if (att->Type == GL_TEXTURE) {
 664          const struct gl_texture_image *texImg
 665             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 666          minWidth = MIN2(minWidth, texImg->Width);
 667          maxWidth = MAX2(maxWidth, texImg->Width);
 668          minHeight = MIN2(minHeight, texImg->Height);
 669          maxHeight = MAX2(maxHeight, texImg->Height);
 670          f = texImg->_BaseFormat;
 671          mesaFormat = texImg->TexFormat;
 672          numImages++;
 673          if (!_mesa_is_legal_color_format(ctx, f) &&
 674              !is_legal_depth_format(ctx, f)) {
 675             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 676             fbo_incomplete("texture attachment incomplete", -1);
 677             return;
 678          }
 679       }
 680       else if (att->Type == GL_RENDERBUFFER_EXT) {
 681          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 682          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 683          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 684          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 685          f = att->Renderbuffer->InternalFormat;
 686          mesaFormat = att->Renderbuffer->Format;
 687          numImages++;
 688       }
 689       else {
 690          assert(att->Type == GL_NONE);
 691          continue;
 692       }
 693
 694       if (numSamples < 0) {
 695          /* first buffer */
 696          numSamples = att->Renderbuffer->NumSamples;
 697       }
 698
 699       /* check if integer color */
 700       fb->_IntegerColor = _mesa_is_format_integer_color(mesaFormat);
 701
 702       /* Error-check width, height, format, samples
 703        */
 704       if (numImages == 1) {
 705          /* save format, num samples */
 706          if (i >= 0) {
 707             intFormat = f;
 708          }
 709       }
 710       else {
 711          if (!ctx->Extensions.ARB_framebuffer_object) {
 712             /* check that width, height, format are same */
 713             if (minWidth != maxWidth || minHeight != maxHeight) {
 714                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 715                fbo_incomplete("width or height mismatch", -1);
 716                return;
 717             }
 718             /* check that all color buffer have same format */
 719             if (intFormat != GL_NONE && f != intFormat) {
 720                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 721                fbo_incomplete("format mismatch", -1);
 722                return;
 723             }
 724          }
 725          if (att->Renderbuffer &&
 726              att->Renderbuffer->NumSamples != numSamples) {
 727             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 728             fbo_incomplete("inconsistant number of samples", i);
 729             return;
 730          }
 731
 732       }
 733    }
 734
 735 #if FEATURE_GL
 736    if (ctx->API == API_OPENGL) {
 737       /* Check that all DrawBuffers are present */
 738       for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 739          if (fb->ColorDrawBuffer[j] != GL_NONE) {
 740             const struct gl_renderbuffer_attachment *att
 741                = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 742             assert(att);
 743             if (att->Type == GL_NONE) {
 744                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 745                fbo_incomplete("missing drawbuffer", j);
 746                return;
 747             }
 748          }
 749       }
 750
 751       /* Check that the ReadBuffer is present */
 752       if (fb->ColorReadBuffer != GL_NONE) {
 753          const struct gl_renderbuffer_attachment *att
 754             = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 755          assert(att);
 756          if (att->Type == GL_NONE) {
 757             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 758             fbo_incomplete("missing readbuffer", -1);
 759             return;
 760          }
 761       }
 762    }
 763 #else
 764    (void) j;
 765 #endif
 766
 767    if (numImages == 0) {
 768       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 769       fbo_incomplete("no attachments", -1);
 770       return;
 771    }
 772
 773    /* Provisionally set status = COMPLETE ... */
 774    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 775
 776    /* ... but the driver may say the FB is incomplete.
 777     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 778     * if anything.
 779     */
 780    if (ctx->Driver.ValidateFramebuffer) {
 781       ctx->Driver.ValidateFramebuffer(ctx, fb);
 782       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 783          fbo_incomplete("driver marked FBO as incomplete", -1);
 784       }
 785    }
 786
 787    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 788       /*
 789        * Note that if ARB_framebuffer_object is supported and the attached
 790        * renderbuffers/textures are different sizes, the framebuffer
 791        * width/height will be set to the smallest width/height.
 792        */
 793       fb->Width = minWidth;
 794       fb->Height = minHeight;
 795
 796       /* finally, update the visual info for the framebuffer */
 797       _mesa_update_framebuffer_visual(ctx, fb);
 798    }
 799 }
 800
 801
 802 GLboolean GLAPIENTRY
 803 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 804 {
 805    GET_CURRENT_CONTEXT(ctx);
 806    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 807    if (renderbuffer) {
 808       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 809       if (rb != NULL && rb != &DummyRenderbuffer)
 810          return GL_TRUE;
 811    }
 812    return GL_FALSE;
 813 }
 814
 815
 816 void GLAPIENTRY
 817 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 818 {
 819    struct gl_renderbuffer *newRb;
 820    GET_CURRENT_CONTEXT(ctx);
 821
 822    ASSERT_OUTSIDE_BEGIN_END(ctx);
 823
 824    if (target != GL_RENDERBUFFER_EXT) {
 825       _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
 826       return;
 827    }
 828
 829    /* No need to flush here since the render buffer binding has no
 830     * effect on rendering state.
 831     */
 832
 833    if (renderbuffer) {
 834       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 835       if (newRb == &DummyRenderbuffer) {
 836          /* ID was reserved, but no real renderbuffer object made yet */
 837          newRb = NULL;
 838       }
 839       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 840          /* All RB IDs must be Gen'd */
 841          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 842          return;
 843       }
 844
 845       if (!newRb) {
 846          /* create new renderbuffer object */
 847          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 848          if (!newRb) {
 849             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 850             return;
 851          }
 852          ASSERT(newRb->AllocStorage);
 853          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 854          newRb->RefCount = 1; /* referenced by hash table */
 855       }
 856    }
 857    else {
 858       newRb = NULL;
 859    }
 860
 861    ASSERT(newRb != &DummyRenderbuffer);
 862
 863    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 864 }
 865
 866
 867 /**
 868  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 869  * the renderbuffer.
 870  * This is used when a renderbuffer object is deleted.
 871  * The spec calls for unbinding.
 872  */
 873 static void
 874 detach_renderbuffer(struct gl_context *ctx,
 875                     struct gl_framebuffer *fb,
 876                     struct gl_renderbuffer *rb)
 877 {
 878    GLuint i;
 879    for (i = 0; i < BUFFER_COUNT; i++) {
 880       if (fb->Attachment[i].Renderbuffer == rb) {
 881          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 882       }
 883    }
 884    invalidate_framebuffer(fb);
 885 }
 886
 887
 888 void GLAPIENTRY
 889 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 890 {
 891    GLint i;
 892    GET_CURRENT_CONTEXT(ctx);
 893
 894    ASSERT_OUTSIDE_BEGIN_END(ctx);
 895    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 896
 897    for (i = 0; i < n; i++) {
 898       if (renderbuffers[i] > 0) {
 899          struct gl_renderbuffer *rb;
 900          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 901          if (rb) {
 902             /* check if deleting currently bound renderbuffer object */
 903             if (rb == ctx->CurrentRenderbuffer) {
 904                /* bind default */
 905                ASSERT(rb->RefCount >= 2);
 906                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 907             }
 908
 909             if (ctx->DrawBuffer->Name) {
 910                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 911             }
 912             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 913                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 914             }
 915
 916             /* Remove from hash table immediately, to free the ID.
 917              * But the object will not be freed until it's no longer
 918              * referenced anywhere else.
 919              */
 920             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 921
 922             if (rb != &DummyRenderbuffer) {
 923                /* no longer referenced by hash table */
 924                _mesa_reference_renderbuffer(&rb, NULL);
 925             }
 926          }
 927       }
 928    }
 929 }
 930
 931
 932 void GLAPIENTRY
 933 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 934 {
 935    GET_CURRENT_CONTEXT(ctx);
 936    GLuint first;
 937    GLint i;
 938
 939    ASSERT_OUTSIDE_BEGIN_END(ctx);
 940
 941    if (n < 0) {
 942       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 943       return;
 944    }
 945
 946    if (!renderbuffers)
 947       return;
 948
 949    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 950
 951    for (i = 0; i < n; i++) {
 952       GLuint name = first + i;
 953       renderbuffers[i] = name;
 954       /* insert dummy placeholder into hash table */
 955       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 956       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 957       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 958    }
 959 }
 960
 961
 962 /**
 963  * Given an internal format token for a render buffer, return the
 964  * corresponding base format.
 965  * This is very similar to _mesa_base_tex_format() but the set of valid
 966  * internal formats is somewhat different.
 967  *
 968  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 969  *  GL_DEPTH_STENCIL_EXT or zero if error.
 970  *
 971  * XXX in the future when we support red-only and red-green formats
 972  * we'll also return GL_RED and GL_RG.
 973  */
 974 GLenum
 975 _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
 976 {
 977    switch (internalFormat) {
 978    case GL_ALPHA:
 979    case GL_ALPHA4:
 980    case GL_ALPHA8:
 981    case GL_ALPHA12:
 982    case GL_ALPHA16:
 983       return GL_ALPHA;
 984    case GL_RGB:
 985    case GL_R3_G3_B2:
 986    case GL_RGB4:
 987    case GL_RGB5:
 988    case GL_RGB8:
 989    case GL_RGB10:
 990    case GL_RGB12:
 991    case GL_RGB16:
 992    case GL_SRGB8_EXT:
 993       return GL_RGB;
 994    case GL_RGBA:
 995    case GL_RGBA2:
 996    case GL_RGBA4:
 997    case GL_RGB5_A1:
 998    case GL_RGBA8:
 999    case GL_RGB10_A2:
1000    case GL_RGBA12:
1001    case GL_RGBA16:
1002    case GL_RGBA16_SNORM:
1003    case GL_SRGB8_ALPHA8_EXT:
1004       return GL_RGBA;
1005    case GL_STENCIL_INDEX:
1006    case GL_STENCIL_INDEX1_EXT:
1007    case GL_STENCIL_INDEX4_EXT:
1008    case GL_STENCIL_INDEX8_EXT:
1009    case GL_STENCIL_INDEX16_EXT:
1010       return GL_STENCIL_INDEX;
1011    case GL_DEPTH_COMPONENT:
1012    case GL_DEPTH_COMPONENT16:
1013    case GL_DEPTH_COMPONENT24:
1014    case GL_DEPTH_COMPONENT32:
1015       return GL_DEPTH_COMPONENT;
1016    case GL_DEPTH_STENCIL_EXT:
1017    case GL_DEPTH24_STENCIL8_EXT:
1018       if (ctx->Extensions.EXT_packed_depth_stencil)
1019          return GL_DEPTH_STENCIL_EXT;
1020       else
1021          return 0;
1022    /* XXX add floating point formats eventually */
1023    default:
1024       return 0;
1025    }
1026 }
1027
1028
1029 /** sentinal value, see below */
1030 #define NO_SAMPLES 1000
1031
1032
1033 /**
1034  * Helper function used by _mesa_RenderbufferStorageEXT() and
1035  * _mesa_RenderbufferStorageMultisample().
1036  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
1037  */
1038 static void
1039 renderbuffer_storage(GLenum target, GLenum internalFormat,
1040                      GLsizei width, GLsizei height, GLsizei samples)
1041 {
1042    const char *func = samples == NO_SAMPLES ?
1043       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
1044    struct gl_renderbuffer *rb;
1045    GLenum baseFormat;
1046    GET_CURRENT_CONTEXT(ctx);
1047
1048    ASSERT_OUTSIDE_BEGIN_END(ctx);
1049
1050    if (target != GL_RENDERBUFFER_EXT) {
1051       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
1052       return;
1053    }
1054
1055    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
1056    if (baseFormat == 0) {
1057       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
1058       return;
1059    }
1060
1061    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1062       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
1063       return;
1064    }
1065
1066    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1067       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
1068       return;
1069    }
1070
1071    if (samples == NO_SAMPLES) {
1072       /* NumSamples == 0 indicates non-multisampling */
1073       samples = 0;
1074    }
1075    else if (samples > (GLsizei) ctx->Const.MaxSamples) {
1076       /* note: driver may choose to use more samples than what's requested */
1077       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
1078       return;
1079    }
1080
1081    rb = ctx->CurrentRenderbuffer;
1082    if (!rb) {
1083       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
1084       return;
1085    }
1086
1087    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1088
1089    if (rb->InternalFormat == internalFormat &&
1090        rb->Width == (GLuint) width &&
1091        rb->Height == (GLuint) height) {
1092       /* no change in allocation needed */
1093       return;
1094    }
1095
1096    /* These MUST get set by the AllocStorage func */
1097    rb->Format = MESA_FORMAT_NONE;
1098    rb->NumSamples = samples;
1099
1100    /* Now allocate the storage */
1101    ASSERT(rb->AllocStorage);
1102    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
1103       /* No error - check/set fields now */
1104       assert(rb->Format != MESA_FORMAT_NONE);
1105       assert(rb->Width == (GLuint) width);
1106       assert(rb->Height == (GLuint) height);
1107       rb->InternalFormat = internalFormat;
1108       rb->_BaseFormat = baseFormat;
1109       assert(rb->_BaseFormat != 0);
1110    }
1111    else {
1112       /* Probably ran out of memory - clear the fields */
1113       rb->Width = 0;
1114       rb->Height = 0;
1115       rb->Format = MESA_FORMAT_NONE;
1116       rb->InternalFormat = GL_NONE;
1117       rb->_BaseFormat = GL_NONE;
1118       rb->NumSamples = 0;
1119    }
1120
1121    /*
1122    test_framebuffer_completeness(ctx, fb);
1123    */
1124    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1125     * points???
1126     */
1127 }
1128
1129
1130 #if FEATURE_OES_EGL_image
1131 void GLAPIENTRY
1132 _mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
1133 {
1134    struct gl_renderbuffer *rb;
1135    GET_CURRENT_CONTEXT(ctx);
1136    ASSERT_OUTSIDE_BEGIN_END(ctx);
1137
1138    if (!ctx->Extensions.OES_EGL_image) {
1139       _mesa_error(ctx, GL_INVALID_OPERATION,
1140                   "glEGLImageTargetRenderbufferStorageOES(unsupported)");
1141       return;
1142    }
1143
1144    if (target != GL_RENDERBUFFER) {
1145       _mesa_error(ctx, GL_INVALID_ENUM,
1146                   "EGLImageTargetRenderbufferStorageOES");
1147       return;
1148    }
1149
1150    rb = ctx->CurrentRenderbuffer;
1151    if (!rb) {
1152       _mesa_error(ctx, GL_INVALID_OPERATION,
1153                   "EGLImageTargetRenderbufferStorageOES");
1154       return;
1155    }
1156
1157    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1158
1159    ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
1160 }
1161 #endif
1162
1163
1164 /**
1165  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1166  * _mesa_GetFramebufferAttachmentParameterivEXT()
1167  * We have to be careful to respect the base format.  For example, if a
1168  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1169  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1170  * we need to return zero.
1171  */
1172 static GLint
1173 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1174 {
1175    switch (pname) {
1176    case GL_RENDERBUFFER_RED_SIZE_EXT:
1177    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1178       if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
1179           baseFormat == GL_RG || baseFormat == GL_RED)
1180          return _mesa_get_format_bits(format, pname);
1181       else
1182          return 0;
1183    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1184    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1185       if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
1186          return _mesa_get_format_bits(format, pname);
1187       else
1188          return 0;
1189    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1190    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1191       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1192          return _mesa_get_format_bits(format, pname);
1193       else
1194          return 0;
1195    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1196    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1197       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
1198           baseFormat == GL_LUMINANCE_ALPHA)
1199          return _mesa_get_format_bits(format, pname);
1200       else
1201          return 0;
1202    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1203    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1204       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1205          return _mesa_get_format_bits(format, pname);
1206       else
1207          return 0;
1208    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1209    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1210       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1211          return _mesa_get_format_bits(format, pname);
1212       else
1213          return 0;
1214    default:
1215       return 0;
1216    }
1217 }
1218
1219
1220
1221 void GLAPIENTRY
1222 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1223                              GLsizei width, GLsizei height)
1224 {
1225    /* GL_ARB_fbo says calling this function is equivalent to calling
1226     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1227     * a token value here just for error reporting purposes.
1228     */
1229    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1230 }
1231
1232
1233 void GLAPIENTRY
1234 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1235                                      GLenum internalFormat,
1236                                      GLsizei width, GLsizei height)
1237 {
1238    renderbuffer_storage(target, internalFormat, width, height, samples);
1239 }
1240
1241
1242 /**
1243  * OpenGL ES version of glRenderBufferStorage.
1244  */
1245 void GLAPIENTRY
1246 _es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1247                            GLsizei width, GLsizei height)
1248 {
1249    switch (internalFormat) {
1250    case GL_RGB565:
1251       /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
1252       /* choose a closest format */
1253       internalFormat = GL_RGB5;
1254       break;
1255    default:
1256       break;
1257    }
1258
1259    renderbuffer_storage(target, internalFormat, width, height, 0);
1260 }
1261
1262
1263 void GLAPIENTRY
1264 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1265 {
1266    struct gl_renderbuffer *rb;
1267    GET_CURRENT_CONTEXT(ctx);
1268
1269    ASSERT_OUTSIDE_BEGIN_END(ctx);
1270
1271    if (target != GL_RENDERBUFFER_EXT) {
1272       _mesa_error(ctx, GL_INVALID_ENUM,
1273                   "glGetRenderbufferParameterivEXT(target)");
1274       return;
1275    }
1276
1277    rb = ctx->CurrentRenderbuffer;
1278    if (!rb) {
1279       _mesa_error(ctx, GL_INVALID_OPERATION,
1280                   "glGetRenderbufferParameterivEXT");
1281       return;
1282    }
1283
1284    /* No need to flush here since we're just quering state which is
1285     * not effected by rendering.
1286     */
1287
1288    switch (pname) {
1289    case GL_RENDERBUFFER_WIDTH_EXT:
1290       *params = rb->Width;
1291       return;
1292    case GL_RENDERBUFFER_HEIGHT_EXT:
1293       *params = rb->Height;
1294       return;
1295    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1296       *params = rb->InternalFormat;
1297       return;
1298    case GL_RENDERBUFFER_RED_SIZE_EXT:
1299    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1300    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1301    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1302    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1303    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1304       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1305       break;
1306    case GL_RENDERBUFFER_SAMPLES:
1307       if (ctx->Extensions.ARB_framebuffer_object) {
1308          *params = rb->NumSamples;
1309          break;
1310       }
1311       /* fallthrough */
1312    default:
1313       _mesa_error(ctx, GL_INVALID_ENUM,
1314                   "glGetRenderbufferParameterivEXT(target)");
1315       return;
1316    }
1317 }
1318
1319
1320 GLboolean GLAPIENTRY
1321 _mesa_IsFramebufferEXT(GLuint framebuffer)
1322 {
1323    GET_CURRENT_CONTEXT(ctx);
1324    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1325    if (framebuffer) {
1326       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1327       if (rb != NULL && rb != &DummyFramebuffer)
1328          return GL_TRUE;
1329    }
1330    return GL_FALSE;
1331 }
1332
1333
1334 /**
1335  * Check if any of the attachments of the given framebuffer are textures
1336  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1337  * attachments.
1338  */
1339 static void
1340 check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1341 {
1342    GLuint i;
1343    ASSERT(ctx->Driver.RenderTexture);
1344
1345    if (fb->Name == 0)
1346       return; /* can't render to texture with winsys framebuffers */
1347
1348    for (i = 0; i < BUFFER_COUNT; i++) {
1349       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1350       struct gl_texture_object *texObj = att->Texture;
1351       if (texObj
1352           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1353          ctx->Driver.RenderTexture(ctx, fb, att);
1354       }
1355    }
1356 }
1357
1358
1359 /**
1360  * Examine all the framebuffer's attachments to see if any are textures.
1361  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1362  * notify the device driver that the texture image may have changed.
1363  */
1364 static void
1365 check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1366 {
1367    if (fb->Name == 0)
1368       return; /* can't render to texture with winsys framebuffers */
1369
1370    if (ctx->Driver.FinishRenderTexture) {
1371       GLuint i;
1372       for (i = 0; i < BUFFER_COUNT; i++) {
1373          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1374          if (att->Texture && att->Renderbuffer) {
1375             ctx->Driver.FinishRenderTexture(ctx, att);
1376          }
1377       }
1378    }
1379 }
1380
1381
1382 void GLAPIENTRY
1383 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1384 {
1385    struct gl_framebuffer *newDrawFb, *newReadFb;
1386    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1387    GLboolean bindReadBuf, bindDrawBuf;
1388    GET_CURRENT_CONTEXT(ctx);
1389
1390 #ifdef DEBUG
1391    if (ctx->Extensions.ARB_framebuffer_object) {
1392       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1393       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1394    }
1395 #endif
1396
1397    ASSERT_OUTSIDE_BEGIN_END(ctx);
1398
1399    if (!ctx->Extensions.EXT_framebuffer_object) {
1400       _mesa_error(ctx, GL_INVALID_OPERATION,
1401                   "glBindFramebufferEXT(unsupported)");
1402       return;
1403    }
1404
1405    switch (target) {
1406 #if FEATURE_EXT_framebuffer_blit
1407    case GL_DRAW_FRAMEBUFFER_EXT:
1408       if (!ctx->Extensions.EXT_framebuffer_blit) {
1409          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1410          return;
1411       }
1412       bindDrawBuf = GL_TRUE;
1413       bindReadBuf = GL_FALSE;
1414       break;
1415    case GL_READ_FRAMEBUFFER_EXT:
1416       if (!ctx->Extensions.EXT_framebuffer_blit) {
1417          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1418          return;
1419       }
1420       bindDrawBuf = GL_FALSE;
1421       bindReadBuf = GL_TRUE;
1422       break;
1423 #endif
1424    case GL_FRAMEBUFFER_EXT:
1425       bindDrawBuf = GL_TRUE;
1426       bindReadBuf = GL_TRUE;
1427       break;
1428    default:
1429       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1430       return;
1431    }
1432
1433    if (framebuffer) {
1434       /* Binding a user-created framebuffer object */
1435       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1436       if (newDrawFb == &DummyFramebuffer) {
1437          /* ID was reserved, but no real framebuffer object made yet */
1438          newDrawFb = NULL;
1439       }
1440       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1441          /* All FBO IDs must be Gen'd */
1442          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1443          return;
1444       }
1445
1446       if (!newDrawFb) {
1447          /* create new framebuffer object */
1448          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1449          if (!newDrawFb) {
1450             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1451             return;
1452          }
1453          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1454       }
1455       newReadFb = newDrawFb;
1456    }
1457    else {
1458       /* Binding the window system framebuffer (which was originally set
1459        * with MakeCurrent).
1460        */
1461       newDrawFb = ctx->WinSysDrawBuffer;
1462       newReadFb = ctx->WinSysReadBuffer;
1463    }
1464
1465    ASSERT(newDrawFb);
1466    ASSERT(newDrawFb != &DummyFramebuffer);
1467
1468    /* save pointers to current/old framebuffers */
1469    oldDrawFb = ctx->DrawBuffer;
1470    oldReadFb = ctx->ReadBuffer;
1471
1472    /* check if really changing bindings */
1473    if (oldDrawFb == newDrawFb)
1474       bindDrawBuf = GL_FALSE;
1475    if (oldReadFb == newReadFb)
1476       bindReadBuf = GL_FALSE;
1477
1478    /*
1479     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1480     *
1481     * We also check if we're beginning and/or ending render-to-texture.
1482     * When a framebuffer with texture attachments is unbound, call
1483     * ctx->Driver.FinishRenderTexture().
1484     * When a framebuffer with texture attachments is bound, call
1485     * ctx->Driver.RenderTexture().
1486     *
1487     * Note that if the ReadBuffer has texture attachments we don't consider
1488     * that a render-to-texture case.
1489     */
1490    if (bindReadBuf) {
1491       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1492
1493       /* check if old readbuffer was render-to-texture */
1494       check_end_texture_render(ctx, oldReadFb);
1495
1496       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1497    }
1498
1499    if (bindDrawBuf) {
1500       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1501
1502       /* check if old read/draw buffers were render-to-texture */
1503       if (!bindReadBuf)
1504          check_end_texture_render(ctx, oldReadFb);
1505
1506       if (oldDrawFb != oldReadFb)
1507          check_end_texture_render(ctx, oldDrawFb);
1508
1509       /* check if newly bound framebuffer has any texture attachments */
1510       check_begin_texture_render(ctx, newDrawFb);
1511
1512       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1513    }
1514
1515    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1516       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1517    }
1518 }
1519
1520
1521 void GLAPIENTRY
1522 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1523 {
1524    GLint i;
1525    GET_CURRENT_CONTEXT(ctx);
1526
1527    ASSERT_OUTSIDE_BEGIN_END(ctx);
1528    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1529
1530    for (i = 0; i < n; i++) {
1531       if (framebuffers[i] > 0) {
1532          struct gl_framebuffer *fb;
1533          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1534          if (fb) {
1535             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1536
1537             /* check if deleting currently bound framebuffer object */
1538             if (ctx->Extensions.EXT_framebuffer_blit) {
1539                /* separate draw/read binding points */
1540                if (fb == ctx->DrawBuffer) {
1541                   /* bind default */
1542                   ASSERT(fb->RefCount >= 2);
1543                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1544                }
1545                if (fb == ctx->ReadBuffer) {
1546                   /* bind default */
1547                   ASSERT(fb->RefCount >= 2);
1548                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1549                }
1550             }
1551             else {
1552                /* only one binding point for read/draw buffers */
1553                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1554                   /* bind default */
1555                   ASSERT(fb->RefCount >= 2);
1556                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1557                }
1558             }
1559
1560             /* remove from hash table immediately, to free the ID */
1561             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1562
1563             if (fb != &DummyFramebuffer) {
1564                /* But the object will not be freed until it's no longer
1565                 * bound in any context.
1566                 */
1567                _mesa_reference_framebuffer(&fb, NULL);
1568             }
1569          }
1570       }
1571    }
1572 }
1573
1574
1575 void GLAPIENTRY
1576 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1577 {
1578    GET_CURRENT_CONTEXT(ctx);
1579    GLuint first;
1580    GLint i;
1581
1582    ASSERT_OUTSIDE_BEGIN_END(ctx);
1583
1584    if (n < 0) {
1585       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1586       return;
1587    }
1588
1589    if (!framebuffers)
1590       return;
1591
1592    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1593
1594    for (i = 0; i < n; i++) {
1595       GLuint name = first + i;
1596       framebuffers[i] = name;
1597       /* insert dummy placeholder into hash table */
1598       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1599       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1600       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1601    }
1602 }
1603
1604
1605
1606 GLenum GLAPIENTRY
1607 _mesa_CheckFramebufferStatusEXT(GLenum target)
1608 {
1609    struct gl_framebuffer *buffer;
1610    GET_CURRENT_CONTEXT(ctx);
1611
1612    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1613
1614    switch (target) {
1615 #if FEATURE_EXT_framebuffer_blit
1616    case GL_DRAW_FRAMEBUFFER_EXT:
1617       if (!ctx->Extensions.EXT_framebuffer_blit) {
1618          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1619          return 0;
1620       }
1621       buffer = ctx->DrawBuffer;
1622       break;
1623    case GL_READ_FRAMEBUFFER_EXT:
1624       if (!ctx->Extensions.EXT_framebuffer_blit) {
1625          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1626          return 0;
1627       }
1628       buffer = ctx->ReadBuffer;
1629       break;
1630 #endif
1631    case GL_FRAMEBUFFER_EXT:
1632       buffer = ctx->DrawBuffer;
1633       break;
1634    default:
1635       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1636       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1637    }
1638
1639    if (buffer->Name == 0) {
1640       /* The window system / default framebuffer is always complete */
1641       return GL_FRAMEBUFFER_COMPLETE_EXT;
1642    }
1643
1644    /* No need to flush here */
1645
1646    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1647       _mesa_test_framebuffer_completeness(ctx, buffer);
1648    }
1649
1650    return buffer->_Status;
1651 }
1652
1653
1654
1655 /**
1656  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1657  */
1658 static void
1659 framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
1660                     GLenum attachment, GLenum textarget, GLuint texture,
1661                     GLint level, GLint zoffset)
1662 {
1663    struct gl_renderbuffer_attachment *att;
1664    struct gl_texture_object *texObj = NULL;
1665    struct gl_framebuffer *fb;
1666    GLboolean error = GL_FALSE;
1667
1668    ASSERT_OUTSIDE_BEGIN_END(ctx);
1669
1670    switch (target) {
1671    case GL_READ_FRAMEBUFFER_EXT:
1672       error = !ctx->Extensions.EXT_framebuffer_blit;
1673       fb = ctx->ReadBuffer;
1674       break;
1675    case GL_DRAW_FRAMEBUFFER_EXT:
1676       error = !ctx->Extensions.EXT_framebuffer_blit;
1677       /* fall-through */
1678    case GL_FRAMEBUFFER_EXT:
1679       fb = ctx->DrawBuffer;
1680       break;
1681    default:
1682       error = GL_TRUE;
1683    }
1684
1685    if (error) {
1686       _mesa_error(ctx, GL_INVALID_ENUM,
1687                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1688       return;
1689    }
1690
1691    ASSERT(fb);
1692
1693    /* check framebuffer binding */
1694    if (fb->Name == 0) {
1695       _mesa_error(ctx, GL_INVALID_OPERATION,
1696                   "glFramebufferTexture%sEXT", caller);
1697       return;
1698    }
1699
1700
1701    /* The textarget, level, and zoffset parameters are only validated if
1702     * texture is non-zero.
1703     */
1704    if (texture) {
1705       GLboolean err = GL_TRUE;
1706
1707       texObj = _mesa_lookup_texture(ctx, texture);
1708       if (texObj != NULL) {
1709          if (textarget == 0) {
1710             /* XXX what's the purpose of this? */
1711             err = (texObj->Target != GL_TEXTURE_3D) &&
1712                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1713                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1714          }
1715          else {
1716             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1717                 ? !IS_CUBE_FACE(textarget)
1718                 : (texObj->Target != textarget);
1719          }
1720       }
1721       else {
1722          /* can't render to a non-existant texture */
1723          _mesa_error(ctx, GL_INVALID_OPERATION,
1724                      "glFramebufferTexture%sEXT(non existant texture)",
1725                      caller);
1726          return;
1727       }
1728
1729       if (err) {
1730          _mesa_error(ctx, GL_INVALID_OPERATION,
1731                      "glFramebufferTexture%sEXT(texture target mismatch)",
1732                      caller);
1733          return;
1734       }
1735
1736       if (texObj->Target == GL_TEXTURE_3D) {
1737          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1738          if (zoffset < 0 || zoffset >= maxSize) {
1739             _mesa_error(ctx, GL_INVALID_VALUE,
1740                         "glFramebufferTexture%sEXT(zoffset)", caller);
1741             return;
1742          }
1743       }
1744       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1745                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1746          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1747             _mesa_error(ctx, GL_INVALID_VALUE,
1748                         "glFramebufferTexture%sEXT(layer)", caller);
1749             return;
1750          }
1751       }
1752
1753       if ((level < 0) ||
1754           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1755          _mesa_error(ctx, GL_INVALID_VALUE,
1756                      "glFramebufferTexture%sEXT(level)", caller);
1757          return;
1758       }
1759    }
1760
1761    att = _mesa_get_attachment(ctx, fb, attachment);
1762    if (att == NULL) {
1763       _mesa_error(ctx, GL_INVALID_ENUM,
1764                   "glFramebufferTexture%sEXT(attachment)", caller);
1765       return;
1766    }
1767
1768    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1769
1770    _glthread_LOCK_MUTEX(fb->Mutex);
1771    if (texObj) {
1772       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1773                                    level, zoffset);
1774       /* Set the render-to-texture flag.  We'll check this flag in
1775        * glTexImage() and friends to determine if we need to revalidate
1776        * any FBOs that might be rendering into this texture.
1777        * This flag never gets cleared since it's non-trivial to determine
1778        * when all FBOs might be done rendering to this texture.  That's OK
1779        * though since it's uncommon to render to a texture then repeatedly
1780        * call glTexImage() to change images in the texture.
1781        */
1782       texObj->_RenderToTexture = GL_TRUE;
1783    }
1784    else {
1785       _mesa_remove_attachment(ctx, att);
1786    }
1787
1788    invalidate_framebuffer(fb);
1789
1790    _glthread_UNLOCK_MUTEX(fb->Mutex);
1791 }
1792
1793
1794
1795 void GLAPIENTRY
1796 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1797                               GLenum textarget, GLuint texture, GLint level)
1798 {
1799    GET_CURRENT_CONTEXT(ctx);
1800
1801    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1802       _mesa_error(ctx, GL_INVALID_ENUM,
1803                   "glFramebufferTexture1DEXT(textarget)");
1804       return;
1805    }
1806
1807    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1808                        level, 0);
1809 }
1810
1811
1812 void GLAPIENTRY
1813 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1814                               GLenum textarget, GLuint texture, GLint level)
1815 {
1816    GET_CURRENT_CONTEXT(ctx);
1817
1818    if ((texture != 0) &&
1819        (textarget != GL_TEXTURE_2D) &&
1820        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1821        (!IS_CUBE_FACE(textarget))) {
1822       _mesa_error(ctx, GL_INVALID_OPERATION,
1823                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1824       return;
1825    }
1826
1827    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1828                        level, 0);
1829 }
1830
1831
1832 void GLAPIENTRY
1833 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1834                               GLenum textarget, GLuint texture,
1835                               GLint level, GLint zoffset)
1836 {
1837    GET_CURRENT_CONTEXT(ctx);
1838
1839    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1840       _mesa_error(ctx, GL_INVALID_ENUM,
1841                   "glFramebufferTexture3DEXT(textarget)");
1842       return;
1843    }
1844
1845    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1846                        level, zoffset);
1847 }
1848
1849
1850 void GLAPIENTRY
1851 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1852                                  GLuint texture, GLint level, GLint layer)
1853 {
1854    GET_CURRENT_CONTEXT(ctx);
1855
1856    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1857                        level, layer);
1858 }
1859
1860
1861 void GLAPIENTRY
1862 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1863                                  GLenum renderbufferTarget,
1864                                  GLuint renderbuffer)
1865 {
1866    struct gl_renderbuffer_attachment *att;
1867    struct gl_framebuffer *fb;
1868    struct gl_renderbuffer *rb;
1869    GET_CURRENT_CONTEXT(ctx);
1870
1871    ASSERT_OUTSIDE_BEGIN_END(ctx);
1872
1873    switch (target) {
1874 #if FEATURE_EXT_framebuffer_blit
1875    case GL_DRAW_FRAMEBUFFER_EXT:
1876       if (!ctx->Extensions.EXT_framebuffer_blit) {
1877          _mesa_error(ctx, GL_INVALID_ENUM,
1878                      "glFramebufferRenderbufferEXT(target)");
1879          return;
1880       }
1881       fb = ctx->DrawBuffer;
1882       break;
1883    case GL_READ_FRAMEBUFFER_EXT:
1884       if (!ctx->Extensions.EXT_framebuffer_blit) {
1885          _mesa_error(ctx, GL_INVALID_ENUM,
1886                      "glFramebufferRenderbufferEXT(target)");
1887          return;
1888       }
1889       fb = ctx->ReadBuffer;
1890       break;
1891 #endif
1892    case GL_FRAMEBUFFER_EXT:
1893       fb = ctx->DrawBuffer;
1894       break;
1895    default:
1896       _mesa_error(ctx, GL_INVALID_ENUM,
1897                   "glFramebufferRenderbufferEXT(target)");
1898       return;
1899    }
1900
1901    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1902       _mesa_error(ctx, GL_INVALID_ENUM,
1903                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1904       return;
1905    }
1906
1907    if (fb->Name == 0) {
1908       /* Can't attach new renderbuffers to a window system framebuffer */
1909       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1910       return;
1911    }
1912
1913    att = _mesa_get_attachment(ctx, fb, attachment);
1914    if (att == NULL) {
1915       _mesa_error(ctx, GL_INVALID_ENUM,
1916                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1917                   _mesa_lookup_enum_by_nr(attachment));
1918       return;
1919    }
1920
1921    if (renderbuffer) {
1922       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1923       if (!rb) {
1924          _mesa_error(ctx, GL_INVALID_OPERATION,
1925                      "glFramebufferRenderbufferEXT(non-existant"
1926                      " renderbuffer %u)", renderbuffer);
1927          return;
1928       }
1929       else if (rb == &DummyRenderbuffer) {
1930          /* This is what NVIDIA does */
1931          _mesa_error(ctx, GL_INVALID_VALUE,
1932                      "glFramebufferRenderbufferEXT(renderbuffer %u)",
1933                      renderbuffer);
1934          return;
1935       }
1936    }
1937    else {
1938       /* remove renderbuffer attachment */
1939       rb = NULL;
1940    }
1941
1942    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
1943        rb && rb->Format != MESA_FORMAT_NONE) {
1944       /* make sure the renderbuffer is a depth/stencil format */
1945       const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
1946       if (baseFormat != GL_DEPTH_STENCIL) {
1947          _mesa_error(ctx, GL_INVALID_OPERATION,
1948                      "glFramebufferRenderbufferEXT(renderbuffer"
1949                      " is not DEPTH_STENCIL format)");
1950          return;
1951       }
1952    }
1953
1954
1955    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1956
1957    assert(ctx->Driver.FramebufferRenderbuffer);
1958    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1959
1960    /* Some subsequent GL commands may depend on the framebuffer's visual
1961     * after the binding is updated.  Update visual info now.
1962     */
1963    _mesa_update_framebuffer_visual(ctx, fb);
1964 }
1965
1966
1967 void GLAPIENTRY
1968 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1969                                              GLenum pname, GLint *params)
1970 {
1971    const struct gl_renderbuffer_attachment *att;
1972    struct gl_framebuffer *buffer;
1973    GET_CURRENT_CONTEXT(ctx);
1974
1975    ASSERT_OUTSIDE_BEGIN_END(ctx);
1976
1977    switch (target) {
1978 #if FEATURE_EXT_framebuffer_blit
1979    case GL_DRAW_FRAMEBUFFER_EXT:
1980       if (!ctx->Extensions.EXT_framebuffer_blit) {
1981          _mesa_error(ctx, GL_INVALID_ENUM,
1982                      "glGetFramebufferAttachmentParameterivEXT(target)");
1983          return;
1984       }
1985       buffer = ctx->DrawBuffer;
1986       break;
1987    case GL_READ_FRAMEBUFFER_EXT:
1988       if (!ctx->Extensions.EXT_framebuffer_blit) {
1989          _mesa_error(ctx, GL_INVALID_ENUM,
1990                      "glGetFramebufferAttachmentParameterivEXT(target)");
1991          return;
1992       }
1993       buffer = ctx->ReadBuffer;
1994       break;
1995 #endif
1996    case GL_FRAMEBUFFER_EXT:
1997       buffer = ctx->DrawBuffer;
1998       break;
1999    default:
2000       _mesa_error(ctx, GL_INVALID_ENUM,
2001                   "glGetFramebufferAttachmentParameterivEXT(target)");
2002       return;
2003    }
2004
2005    if (buffer->Name == 0) {
2006       /* the default / window-system FBO */
2007       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
2008    }
2009    else {
2010       /* user-created framebuffer FBO */
2011       att = _mesa_get_attachment(ctx, buffer, attachment);
2012    }
2013
2014    if (att == NULL) {
2015       _mesa_error(ctx, GL_INVALID_ENUM,
2016                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
2017       return;
2018    }
2019
2020    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
2021       /* the depth and stencil attachments must point to the same buffer */
2022       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
2023       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
2024       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
2025       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
2026          _mesa_error(ctx, GL_INVALID_OPERATION,
2027                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
2028                      " attachments differ)");
2029          return;
2030       }
2031    }
2032
2033    /* No need to flush here */
2034
2035    switch (pname) {
2036    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
2037       *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : att->Type;
2038       return;
2039    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
2040       if (att->Type == GL_RENDERBUFFER_EXT) {
2041          *params = att->Renderbuffer->Name;
2042       }
2043       else if (att->Type == GL_TEXTURE) {
2044          *params = att->Texture->Name;
2045       }
2046       else {
2047          assert(att->Type == GL_NONE);
2048          *params = 0;
2049       }
2050       return;
2051    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
2052       if (att->Type == GL_TEXTURE) {
2053          *params = att->TextureLevel;
2054       }
2055       else {
2056          _mesa_error(ctx, GL_INVALID_ENUM,
2057                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2058       }
2059       return;
2060    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
2061       if (att->Type == GL_TEXTURE) {
2062          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
2063             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
2064          }
2065          else {
2066             *params = 0;
2067          }
2068       }
2069       else {
2070          _mesa_error(ctx, GL_INVALID_ENUM,
2071                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2072       }
2073       return;
2074    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
2075       if (att->Type == GL_TEXTURE) {
2076          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
2077             *params = att->Zoffset;
2078          }
2079          else {
2080             *params = 0;
2081          }
2082       }
2083       else {
2084          _mesa_error(ctx, GL_INVALID_ENUM,
2085                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2086       }
2087       return;
2088    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
2089       if (!ctx->Extensions.ARB_framebuffer_object) {
2090          _mesa_error(ctx, GL_INVALID_ENUM,
2091                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2092       }
2093       else {
2094          if (ctx->Extensions.EXT_framebuffer_sRGB) {
2095             *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
2096          }
2097          else {
2098             /* According to ARB_framebuffer_sRGB, we should return LINEAR
2099              * if the sRGB conversion is unsupported. */
2100             *params = GL_LINEAR;
2101          }
2102       }
2103       return;
2104    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
2105       if (!ctx->Extensions.ARB_framebuffer_object) {
2106          _mesa_error(ctx, GL_INVALID_ENUM,
2107                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2108          return;
2109       }
2110       else {
2111          gl_format format = att->Renderbuffer->Format;
2112          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
2113             /* special cases */
2114             *params = GL_INDEX;
2115          }
2116          else {
2117             *params = _mesa_get_format_datatype(format);
2118          }
2119       }
2120       return;
2121    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
2122    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
2123    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
2124    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
2125    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
2126    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
2127       if (!ctx->Extensions.ARB_framebuffer_object) {
2128          _mesa_error(ctx, GL_INVALID_ENUM,
2129                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2130       }
2131       else if (att->Texture) {
2132          const struct gl_texture_image *texImage =
2133             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
2134                                    att->TextureLevel);
2135          if (texImage) {
2136             *params = get_component_bits(pname, texImage->_BaseFormat,
2137                                          texImage->TexFormat);
2138          }
2139          else {
2140             *params = 0;
2141          }
2142       }
2143       else if (att->Renderbuffer) {
2144          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
2145                                       att->Renderbuffer->Format);
2146       }
2147       else {
2148          *params = 0;
2149       }
2150       return;
2151    default:
2152       _mesa_error(ctx, GL_INVALID_ENUM,
2153                   "glGetFramebufferAttachmentParameterivEXT(pname)");
2154       return;
2155    }
2156 }
2157
2158
2159 void GLAPIENTRY
2160 _mesa_GenerateMipmapEXT(GLenum target)
2161 {
2162    struct gl_texture_object *texObj;
2163    GET_CURRENT_CONTEXT(ctx);
2164
2165    ASSERT_OUTSIDE_BEGIN_END(ctx);
2166    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2167
2168    switch (target) {
2169    case GL_TEXTURE_1D:
2170    case GL_TEXTURE_2D:
2171    case GL_TEXTURE_3D:
2172    case GL_TEXTURE_CUBE_MAP:
2173       /* OK, legal value */
2174       break;
2175    default:
2176       /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */
2177       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
2178       return;
2179    }
2180
2181    texObj = _mesa_get_current_tex_object(ctx, target);
2182
2183    if (texObj->BaseLevel >= texObj->MaxLevel) {
2184       /* nothing to do */
2185       return;
2186    }
2187
2188    if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
2189        !_mesa_cube_complete(texObj)) {
2190       _mesa_error(ctx, GL_INVALID_OPERATION,
2191                   "glGenerateMipmap(incomplete cube map)");
2192       return;
2193    }
2194
2195    _mesa_lock_texture(ctx, texObj);
2196    if (target == GL_TEXTURE_CUBE_MAP) {
2197       GLuint face;
2198       for (face = 0; face < 6; face++)
2199          ctx->Driver.GenerateMipmap(ctx,
2200                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
2201                                     texObj);
2202    }
2203    else {
2204       ctx->Driver.GenerateMipmap(ctx, target, texObj);
2205    }
2206    _mesa_unlock_texture(ctx, texObj);
2207 }
2208
2209
2210 #if FEATURE_EXT_framebuffer_blit
2211
2212 static const struct gl_renderbuffer_attachment *
2213 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
2214 {
2215    GLuint i;
2216    for (i = 0; i < Elements(fb->Attachment); i++) {
2217       if (fb->Attachment[i].Renderbuffer == rb)
2218          return &fb->Attachment[i];
2219    }
2220    return NULL;
2221 }
2222
2223
2224
2225 /**
2226  * Blit rectangular region, optionally from one framebuffer to another.
2227  *
2228  * Note, if the src buffer is multisampled and the dest is not, this is
2229  * when the samples must be resolved to a single color.
2230  */
2231 void GLAPIENTRY
2232 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2233                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2234                          GLbitfield mask, GLenum filter)
2235 {
2236    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2237                                      GL_DEPTH_BUFFER_BIT |
2238                                      GL_STENCIL_BUFFER_BIT);
2239    const struct gl_framebuffer *readFb, *drawFb;
2240    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2241    GET_CURRENT_CONTEXT(ctx);
2242
2243    ASSERT_OUTSIDE_BEGIN_END(ctx);
2244    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2245
2246    if (ctx->NewState) {
2247       _mesa_update_state(ctx);
2248    }
2249
2250    readFb = ctx->ReadBuffer;
2251    drawFb = ctx->DrawBuffer;
2252
2253    if (!readFb || !drawFb) {
2254       /* This will normally never happen but someday we may want to
2255        * support MakeCurrent() with no drawables.
2256        */
2257       return;
2258    }
2259
2260    /* check for complete framebuffers */
2261    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2262        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2263       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2264                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2265       return;
2266    }
2267
2268    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2269       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2270       return;
2271    }
2272
2273    if (mask & ~legalMaskBits) {
2274       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2275       return;
2276    }
2277
2278    /* depth/stencil must be blitted with nearest filtering */
2279    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2280         && filter != GL_NEAREST) {
2281       _mesa_error(ctx, GL_INVALID_OPERATION,
2282              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2283       return;
2284    }
2285
2286    /* get color read/draw renderbuffers */
2287    if (mask & GL_COLOR_BUFFER_BIT) {
2288       colorReadRb = readFb->_ColorReadBuffer;
2289       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2290    }
2291    else {
2292       colorReadRb = colorDrawRb = NULL;
2293    }
2294
2295    if (mask & GL_STENCIL_BUFFER_BIT) {
2296       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2297       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2298       if (!readRb ||
2299           !drawRb ||
2300           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2301           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2302          _mesa_error(ctx, GL_INVALID_OPERATION,
2303                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2304          return;
2305       }
2306    }
2307
2308    if (mask & GL_DEPTH_BUFFER_BIT) {
2309       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2310       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2311       if (!readRb ||
2312           !drawRb ||
2313           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2314           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2315          _mesa_error(ctx, GL_INVALID_OPERATION,
2316                      "glBlitFramebufferEXT(depth buffer size mismatch");
2317          return;
2318       }
2319    }
2320
2321    if (readFb->Visual.samples > 0 &&
2322        drawFb->Visual.samples > 0 &&
2323        readFb->Visual.samples != drawFb->Visual.samples) {
2324       _mesa_error(ctx, GL_INVALID_OPERATION,
2325                   "glBlitFramebufferEXT(mismatched samples");
2326       return;
2327    }
2328
2329    /* extra checks for multisample copies... */
2330    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2331       /* src and dest region sizes must be the same */
2332       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2333           srcY1 - srcY0 != dstY1 - dstY0) {
2334          _mesa_error(ctx, GL_INVALID_OPERATION,
2335                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2336          return;
2337       }
2338
2339       /* color formats must match */
2340       if (colorReadRb &&
2341           colorDrawRb &&
2342           colorReadRb->Format != colorDrawRb->Format) {
2343          _mesa_error(ctx, GL_INVALID_OPERATION,
2344                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2345          return;
2346       }
2347    }
2348
2349    if (!ctx->Extensions.EXT_framebuffer_blit) {
2350       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2351       return;
2352    }
2353
2354    /* Debug code */
2355    if (DEBUG_BLIT) {
2356       printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2357              " 0x%x, 0x%x)\n",
2358              srcX0, srcY0, srcX1, srcY1,
2359              dstX0, dstY0, dstX1, dstY1,
2360              mask, filter);
2361       if (colorReadRb) {
2362          const struct gl_renderbuffer_attachment *att;
2363
2364          att = find_attachment(readFb, colorReadRb);
2365          printf("  Src FBO %u  RB %u (%dx%d)  ",
2366                 readFb->Name, colorReadRb->Name,
2367                 colorReadRb->Width, colorReadRb->Height);
2368          if (att && att->Texture) {
2369             printf("Tex %u  tgt 0x%x  level %u  face %u",
2370                    att->Texture->Name,
2371                    att->Texture->Target,
2372                    att->TextureLevel,
2373                    att->CubeMapFace);
2374          }
2375          printf("\n");
2376
2377          att = find_attachment(drawFb, colorDrawRb);
2378          printf("  Dst FBO %u  RB %u (%dx%d)  ",
2379                 drawFb->Name, colorDrawRb->Name,
2380                 colorDrawRb->Width, colorDrawRb->Height);
2381          if (att && att->Texture) {
2382             printf("Tex %u  tgt 0x%x  level %u  face %u",
2383                    att->Texture->Name,
2384                    att->Texture->Target,
2385                    att->TextureLevel,
2386                    att->CubeMapFace);
2387          }
2388          printf("\n");
2389       }
2390    }
2391
2392    ASSERT(ctx->Driver.BlitFramebuffer);
2393    ctx->Driver.BlitFramebuffer(ctx,
2394                                srcX0, srcY0, srcX1, srcY1,
2395                                dstX0, dstY0, dstX1, dstY1,
2396                                mask, filter);
2397 }
2398 #endif /* FEATURE_EXT_framebuffer_blit */
2399
2400 #if FEATURE_ARB_geometry_shader4
2401 void GLAPIENTRY
2402 _mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
2403                             GLuint texture, GLint level)
2404 {
2405    GET_CURRENT_CONTEXT(ctx);
2406    _mesa_error(ctx, GL_INVALID_OPERATION,
2407                "glFramebufferTextureARB "
2408                "not implemented!");
2409 }
2410
2411 void GLAPIENTRY
2412 _mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
2413                                 GLuint texture, GLint level, GLenum face)
2414 {
2415    GET_CURRENT_CONTEXT(ctx);
2416    _mesa_error(ctx, GL_INVALID_OPERATION,
2417                "glFramebufferTextureFaceARB "
2418                "not implemented!");
2419 }
2420 #endif /* FEATURE_ARB_geometry_shader4 */